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Simple and powerful network transmission of ZFS snapshots

simplesnap is a simple way to send ZFS snapshots across a net‐
work. Although it can serve many purposes, its primary goal is
to manage backups from one ZFS filesystem to a backup filesystem
also running ZFS, using incremental backups to minimize network
traffic and disk usage.

simplesnap it is designed to perfectly compliment
snapshotting tools, permitting rotating backups with arbitrary
retention periods. It lets multiple machines back up a single
target, lets one machine back up multiple targets, and keeps it
all straight.

simplesnap is easy; there is no configuration file needed. One
ZFS property is available to exclude datasets/filesystems. ZFS
datasets are automatically discovered on machines being backed
up.

simplesnap is robust in the face of interrupted
transfers, and needs little help to keep running.

nlike many similar tools, simplesnap does not
require full root access to the machines being backed up. It
runs only a small wrapper as root, and the wrapper has only three
commands it implements.